Maybe try these, i am not a developer so i don't know, but people use it
GitHub
GitHub - nostr-dev-kit/ndk: Nostr Development Kit with outbox-model support
Nostr Development Kit with outbox-model support. Contribute to nostr-dev-kit/ndk development by creating an account on GitHub.
GitHub
GitHub - nbd-wtf/nostr-tools: Tools for developing Nostr clients.
Tools for developing Nostr clients. Contribute to nbd-wtf/nostr-tools development by creating an account on GitHub.
